TW201239065A - Novel illumination devices - Google Patents

Abstract

Illumination device comprising at least one LED and at least one colour converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate, wherein LED and colour converter are present in a remote phosphor arrangement.

Description

201239065. VI. Description of the Invention: [Technical Field] The subject matter of the present invention is an illumination device comprising at least one LED and a color converter. The color converter comprises at least one of substantially polystyrene or polycarbonate. An organic fluorescent colorant in a matrix of ester composition wherein the Led and color converters are present in a remote phosphor arrangement. The invention further provides a color converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate. [Prior Art] Global 20°/. The power consumption is required for lighting purposes. The energy efficiency, color reproduction, lifetime, manufacturing cost and availability of lighting equipment are the subject of further technological development. Incandescent and light lamps are heat radiators that produce excellent color reproducible light' because their emission characteristics are close to Planck's law of black body radiation and are very similar to the broad spectrum of luminescence. . One drawback of incandescent lamps is their high power consumption because a large amount of electrical energy is converted into thermal energy. Tight-type fluorescent tubes have higher efficiency, which produces a linear mercury emission spectrum by emitting electrically excited mercury «steam. Within these compact glomer lamps, there are phosphors containing rare earths on the sides. These rare earth-containing phosphors absorb some of the mercury emission spectrum and emit them in the form of green and red light. The emission spectrum of a compact glory tube consists of different lineages, which results in much worse color reproduction. Many people feel that the light of a compact fluorescent tube is less natural and less comfortable than a neon or light from an incandescent lamp. 162631.doc 201239065 Most light-emitting diodes (LEDs) exhibit long life and excellent energy efficiency. The light emission is based on the coincidence of electron hole pairs (excitons) in the junction region of the forward bias semiconductor pn junction. The bandgap size of this semiconductor determines the approximate wavelength. LEDs of different colors can be manufactured. Stable and energy efficient blue LEDs produce white light by color conversion. The polymeric material comprising the radiation-converting phosphor is applied directly to an LED light source (LED wafer) according to known methods for this purpose. The polymeric material is often applied to the LED wafer in the form of a near droplet or hemisphere, whereby specific optical effects contribute to light emission. The structure in which the radiation-converting phosphor in the polymeric matrix is directly applied to the LED wafer without interposing a space into the LED wafer is also referred to as "phosphor on the wafer". In LEDs where the phosphor is on the wafer, the radiation converting phosphor used is typically an inorganic material. A radiation-converting phosphor, which may be composed of, for example, yUrium aluminium garnet, absorbs certain proportions of blue light and emits longer wavelength light having a broad emission band such that transmitted blue light and emitted light may be Mixing produces white light. In order to improve the color reproduction of the illumination elements, a red light diode and the described white light diode can be additionally emitted. This produces light 1 that is more comfortable for many people. This method is technically inconvenient and costly. The LEDm (4) and the radiation-converting phosphor on the X-ray body are subject to relatively high heat and II-induced stress. Therefore, there are still ray-converting discs that are still not suitable for use in phosphors on LEDs on a wafer. Organic fluorescent colorants can in principle produce good color reproduction by means of their wide emission bands. 162631.doc 201239065. However, it has not been sufficiently stable to resist heat and radiation stress until now directly on the LED wafer. In order to generate white light from blue light by color conversion, there is another concept, that is, even a color converter (also referred to simply as "transfer") which usually includes a carrier and a polymeric coating is at a certain distance from the LED wafer. This structure is called "distal phosphor". The spatial distance between the primary source, the LED, and the color converter reduces the stress generated by heat and radiation to the extent that the desired stability can be achieved by a suitable organic fluorescent dye. In addition, the energy efficiency of LEDs based on "remote phosphors" is even higher than that of "LEDs on the wafer". The use of organic fluorescent dyes in these converters has many advantages. First, organic fluorescent dyes provide much higher yields due to their substantially higher mass to absorption ratio, which means that the materials required for efficient radiation conversion are significantly less than in the case of inorganic radiation converters. Second, it achieves good color reproduction and produces a comfortable light. In addition, it does not require any materials containing rare earths, which must be mined and provided at high cost and inconvenient, and can only be used to a limited extent. There is therefore a need to provide a color converter for LEDs comprising a suitable organic fluorescent dye and having a long lifetime. DE 10 2008 057 720 A1 describes the concept of a remote scale LED and reveals that in addition to inorganic radiation-converting phosphors In addition to the conversion layer, organic light-emitting conversion fillers embedded in the polymeric matrix are also used. The polymeric matrix referred to is, for example, polyoxin, % oxide, acrylate or polycarbonate. '' WO 03 (4) 915 A describes the use of ^ (4) as a radiation conversion phosphor] 62631'doc 201239065 on the phosphor on the wafer led » In the LED according to this document, the organic dye is embedded in epoxy resin based on bisphenol A In the matrix of the composition. US 20080252198 discloses a color converter comprising a combination of a red fluorescent dye based on an anthracene derivative and another Rao dye. These color converters are embedded in a transparent medium. The transparent medium can be, for example, polyvinylpyrrolidone, polymethacrylate, polystyrene polycarbonate, polyvinyl acetate, polyethylene, polybutene, Polyethylene Glycol (An Epoxy Resin) SUMMARY OF THE INVENTION One object of the present invention is to provide a lighting device and an organic fluorescent dye-based color converter that does not have the drawbacks of the prior art and particularly has a long life. The invention has the high fluorescence quantum yield. The object is achieved by the lighting device and the color converter cited at the beginning. [Embodiment] The lighting device of the invention comprises at least one LED and at least one color converter. The color converter is also the object of the invention. A portion and according to the invention 'comprising at least one organic glory colorant in a matrix consisting essentially of polystyrene and/or polycarbonate. In the context of the present invention, the color converter is considered to be capable of absorbing specific A device that converts light of wavelengths and converts it into light of other wavelengths. Technically relevant LEDs are often blue LEDs with emission examples. For example, 420 nm to 480 nm 'preferably 440 nm to 470 nm' optimal light with a peak wavelength of 445 run to 460 nm. The color converter of the present invention may emit a plurality of colors depending on the choice of the radiation conversion phosphor and the wavelength of absorption. The light of color. However, in many cases 162631.doc 201239065 * « The goal is to obtain white light. Radiation-converting phosphors include all materials that are capable of absorbing light of a specific wavelength and converting it to light of another wavelength. The material is also known as a phosphor or a fluorescent colorant. The radiation-converting phosphor can be, for example, an inorganic fluorescent coloring agent (such as doped shishishi stone) or an organic fluorescent coloring agent. The organic fluorescent coloring agent can be Organic fluorescent pigment or organic fluorescent dye. The color converter of the present invention comprises at least one organic fluorescent colorant in the form of a buried polymeric matrix consisting essentially of polycarbonate or polystyrene. Organic fluorescent colorants are in principle all organic dyes or pigments that absorb light of a specific wavelength and convert it into light of another wavelength, which is soluble or evenly distributed. In the polymeric matrix, and having sufficient stability for heat and radiation stress. Preferred organic pigments are, for example, anthraquinone pigments. Suitable organic pigments have an average particle size of from 0.01 μm to ΙΟμιη, preferably from 0.1 μπι to 1 μπι, according to DIN 13320. Suitable organic fluorescent dyes fluoresce in the visible range of the spectrum and are, for example, fluorescent, reddish or red-fluorescent fluorescent dyes listed in the Colour Index. Preferred Organic Fluorescent The dye is a functionalized naphthalene or anthracene derivative. Preferably, the naphthalene derivative is a fluorescent dye comprising a green, orange or red-fluorescent pigment comprising a naphthalene unit. There is another preferred naphthalene derivative having one or a plurality of substituents selected from halogen, cyano, benzimidazole or one or more groups having a carbonyl functional group. Suitable carbonyl functional groups are, for example, a carboxylic acid ester, a diimine, a few 162631.doc 201239065 Acid, brewing amine. Preferably, the indole derivative comprises a purine unit. The preferred embodiment relates to green, orange or red-emitting fluorescent light. Preferred are anthracene derivatives having one or more substituents selected from the group consisting of halogen, cyano, benzimidazole or one or more groups having a carbonyl functional group. Suitable carbonyl functional groups are, for example, carboxylates, formamidines, carboxylic acids, decylamines. Preferred anthracene derivatives are, for example, the anthracene derivatives listed on page 1, line 5 to page 22, line 6 of WO2007/006717. In a particularly preferred embodiment, a suitable organic fluorescent dye is an anthracene derivative selected from Formula II to Formula VI.

162631.doc 201239065

Wherein R1 is a linear or branched Cl_c-8 alkyl group, a C4_C8 cycloalkyl group which may be mono- or polysubstituted by halogen or a linear or branched G-Cu alkyl group, or a phenyl group or a naphthyl group wherein a phenyl group Or a naphthyl group may be mono- or polysubstituted by halogen or a straight or branched Ci_Ci8 alkyl group. In one embodiment, 'R in formula II to formula VI' denotes a compound having a so-called swallowtail substitution, such as WO. 2009/037283 A1, page 16, line 19 to page 25, line 8 is listed. In a preferred embodiment, R1 is a 1-alkylalkyl group such as 丨Ethylpropyl, propylpropylbutyl, butylbutylpentyl, 1-pentylhexyl or 丨-hexylheptyl. In the formula VI to the formula VI, X represents an ortho and/or para-substitudin which is preferably a straight chain or a branched chain (^ to 匚^alkyl. "y" indicates the number of substituents X. "y It is a number of 〇3. The RI of Formula II to Formula V! is more preferably 2,4-di(t-butyl) stupyl or 2,6 disubstituted phenyl, especially preferably 2,6_ Diphenylphenyl, 2,6-diisopropylphenyl. X is especially preferred as the ortho/para-tertiary butyl group and/or the ortho-secondary alkyl group 162631.doc •9· 201239065 (especially Is isopropyl) or ortho-phenyl. According to a particular aspect of this embodiment, the organic fluorescent dye is selected from the group > 1 '-bis(2,6-diisopropylphenyl;)_1, 6_Bis(2,6-diisopropylphenoxy)_茈-3,4:9,10-tetramethyldiimine, hydrazine, Ν••bis(2,6-diisopropylbenzene 1,7-bis(2,6-diisopropylphenoxy)_茈_3,4:9,1〇-tetramethyldiimide and mixtures thereof. Another according to this embodiment In a particular aspect, the organic fluorescent dye is Ν_(2,6-mono(isopropyl)phenyl) and-3,4-dicarboxylic acid mono-imine. Another preferred fluorescent dye is a dye of formula vi, for example 1^,1^_double (2,6_two Propyl-based)-1,6,7,12-tetraphenoxy flower_3,4:9,1〇-tetramethyleneimine (Lumogen® Red 300) « In another preferred embodiment Suitable organic fluorescent dyes are selected from the group consisting of formula VII to formula X,

Wherein R1 in the formula VII to the formula X is a linear or branched CrCu alkyl group, which may be mono- or polysubstituted by a linear or branched C^-Cu alkyl group; 2C4_C8 ring-fired 162631.doc -10- 201239065 The base 'is either phenyl or decyl, and the phenyl or naphthyl group in the oxime may be mono- or polysubstituted by halogen or a straight or branched c^cls alkyl group. In one embodiment, R1 in Formula VII to Formula x represents a compound having a so-called dovetail substitution, as recited in WO 2009/037283 A1, page 16, line 19 to page 25, line 8. In a preferred embodiment, R1 is a 1-alkylalkyl group such as 丨Ethylpropyl, 1-propylbutyl, 1-butylpentyl, 1-pentylhexyl or 1-hexylglycol. base. The RI of the formula VII to the formula X is particularly preferably a straight-chain or branched-chain alkyl group, especially n-butyl group, second butyl group, and 2-ethylhexyl group. The formula of the formula 11 is preferably an isobutyl group. According to a particular aspect of this embodiment, the organic fluorescent dye is selected from the group consisting of 3,9-dicyanoindole-4, l-bis (dibutyl carboxylic acid), 310_dicyanoguanidine _4, 9_ Bis (dibutyl phthalate) and mixtures thereof. According to another specific aspect of this embodiment, the organic fluorescent dye is selected from the group consisting of 3,9-dicyanoindole-4,10-bis(isobutyl phthalate), 3,10-dicyanoguanidine-4 , 9-bis (isobutyl formate) and mixtures thereof. Other preferred fluorescent dyes are Disperse Yellow 199, Solvent Yellow 98, Disperse Yellow 13, Disperse Yellow 11, Disperse Yellow 239, Solvent Yellow 159. In a preferred embodiment, the at least one organic fluorescent colorant is selected from the group consisting of ruthenium, Γ-bis(2,6-diisopropylphenyl)-1,7-di(2,6.diiso) Propylphenoxy) 茈-3,4:9,1〇-tetramethyldiimide, team]^,-bis(2,6-diisopropylphenyl)-1,6-di(2 ,6'-diisopropylphenoxy)indole-3,4:9,10-tetramethyldiimide, dicyanindole-4,1 〇-bis (second butyl formate), 3, 10-Dicyanoindole-4,9-bis (second butyl formate), 3,9-dicyanoindole-4,10-bis (isobutyl formate), 162631.doc • 11 - 201239065 3' 1〇_Dicyanoindole·4,9-bis(isobutyl orthoformate), N-(2,6-di(isopropyl)phenyl) flower-3,4-didecanoic acid monoterpene imine and Mixture β In a preferred embodiment, the color converter comprises at least two different organic fluorescent dyes. For example, a green fluorescent fluorescent dye can be combined with a red fluorescent fluorescent dye. Fluorescent dyes that emit green fluorescence are considered to be especially yellow dyes that absorb blue light and emit green or yellow-green fluorescence. A suitable red dye directly absorbs the blue light of Led or absorbs the green light emitted by other dyes present and transmits red fluorescent light. In a less preferred embodiment, the color converter of the present invention comprises only one organic fluorescent dye, such as an orange fluorescent dye. According to the invention, the organic fluorescent dye is embedded in a matrix consisting essentially of polystyrene and/or polycarbonate. When the organic fluorescent colorant is a pigment, these organic fluorescent colorants are usually dispersed in the matrix. The organic fluorescent dye may be present in the matrix or in the form of a mixture of homogeneous distributions. "Organic fluorescent dyes are preferably present in the matrix. Suitable matrix materials are organic polymers consisting essentially of polystyrene and/or polycarbonate. In a preferred embodiment the matrix is comprised of polystyrene or polycarbonate. Polystyrene is here considered to include all homopolymers or copolymers produced by the polymerization of styrene and/or styrene derivatives. Derivatives of styrene are, for example, alkyl styrenes such as Ot-decyl styrene, o-methyl styrene 'm-methyl styrene ethylene, p-methyl styrene, p-butyl 162631.doc 201239065 phenyl styrene (especially It is p-tert-butylstyrene, alkoxystyrene (such as p-nonyloxyethylene, p-butoxystyrene, p-tert-butoxystyrene). Usually 'suitable polystyrene has from 10 000 g/mol to 1 000 〇〇〇. g/m 〇丨 (determined by GPC)' preferably from 20 000 g/mol to 750 000 g/mol, more preferably 30 000 g /m〇丨 to 500 〇〇〇g/mo! The average molar mass Mn. In a preferred embodiment, the matrix of the color converter consists essentially or entirely of a homopolymer of styrene or a stupid ethylene derivative. In other preferred embodiments of the invention, the matrix consists essentially or entirely of a styrene copolymer which, in the context of the present application, is likewise considered to be polystyrene. The styrene copolymer may contain (as other components), for example, butadiene, acrylonitrile, maleic anhydride 'vinyl carbazole or an ester of acrylic acid, methacrylic acid or itaconic acid as a monomer. Suitable styrene copolymers generally comprise at least 20% by weight of styrene, preferably at least 4% by weight and more preferably at least 60% by weight of stupid ethylene. In another embodiment, it comprises at least 90 weights. /. Styrene. Preferred styrene copolymers are styrene-acrylonitrile copolymer (S AN) and acrylonitrile butadiene-styrene copolymer. (ABS), styrene_1, 丨'-stilbene copolymer, Acrylate-styrene_acrylonitrile copolymer (ASA), decyl methacrylate-acrylonitrile butyl styrene copolymer (MABS). Another preferred polymer is alpha-methylstyrene-acrylonitrile copolymer (AMSAN). The styrene homopolymer or copolymer can be, for example, by free radical polymerization, cationic polymerization, anionic polymerization or in an organometallic catalyst. The action is not (for example, Ziegler-Natta catalyst action) preparation. This can result in isotactic, gantry, non-16263I.doc •13-201239065 gauge polystyrene or copolymer. It is preferably prepared by free radical polymerization. The polymerization can be carried out in the form of suspension polymerization, emulsion polymerization, solution polymerization or bulk polymerization. The preparation of suitable polystyrenes is described, for example, in 〇scar Nuyken, Polystyrenes and Other Aromatic Polyvinyl Compounds,

Kricheldorf' Nuyken' Swift, New York 2005, pp. 73-150 and references cited therein; and Elias, Macromolecules, Weinheim 2007, pp. 269-275. Polycarbonates are polyesters of carbonic acid and aromatic or aliphatic dihydroxy compounds. A preferred dihydroxy compound is, for example, a methylene diphenylene dihydroxy compound such as a double age A. One method of preparing polycarbonate is to interfacially polymerize a suitable dihydroxy compound with phosgene. Another method is a condensation polymerization with a diester of carbonic acid such as diphenyl carbonate. The preparation of suitable polycarbonates is described, for example, in Elias, Macr〇m〇lecules,

Weinheim 2007 pp. 343-347. In a preferred embodiment, polystyrene or polycarbonate polymerized in the presence of oxygen is used. During the polymerization, the monomers preferably comprise a total of up to 1000 ppm, more preferably up to 100 ppm and especially preferably up to 1 ppm of oxygen. Suitable polystyrene or polycarbonate may contain additives as other components such as flame retardants, antioxidants, light stabilizers, radical scavengers, antistatic agents, etc. These stabilizers are known to those skilled in the art. know. In a preferred embodiment of the invention, a suitable polystyrene or polycarbonate 162631.doc 201239065 does not contain any antioxidant or free radical scavenger. In the embodiment of the invention, a suitable polystyrene or polycarbonate is a transparent polymer. In another embodiment, a suitable polystyrene or polycarbonate is an opaque polymer. In one embodiment of the invention, the substrate consists essentially or entirely of polystyrene and or polycarbon g "for a mixture with other polymers, but the substrate preferably comprises at least 25% by weight, more preferably 5 Torr. %, optimally at least 7% by weight of polystyrene and/or polycarbonate. In another embodiment, the matrix consists essentially or completely consisting of a mixture of polystyrene or polycarbonate in any ratio. In an embodiment, the matrix consists of a mixture of different polystyrenes and polycarbonates. In one embodiment, the matrix is mechanically reinforced with glass fibers. It has been surprisingly found that organic fluorescent colorants are compared to other matrix materials. The stability in polystyrene or polycarbonate is enhanced. The geometric arrangement of the matrix comprising the organic fluorescent colorant is not critical in the practice of the invention. The matrix comprising the organic fluorescent colorant can be, for example, a film, The sheet or plate is present. The matrix comprising the organic fluorescent colorant may likewise be in the form of droplets or hemispheres, or in the form of lenses, planes or spheres having convex and/or concave surfaces. Shape, the converter of the present invention may, for example, be composed of a single layer or have a multilayer structure. When the color converter of the present invention comprises more than one fluorescent colorant, it may be in an embodiment of the invention at 162631.doc 15 201239065 Several Lacquer colorants are present side by side in a layer. In another embodiment, 'different fluorescent colorants are present in different layers. In one embodiment of the invention, a polymer layer comprising an organic fluorescent dye The thickness of the (matrix) is from 25 micrometers to 200 micrometers, preferably from 35 μm to 150 μm and especially from 50 μm to 1 μm. In another embodiment, the thickness of the polymer layer comprising the organic fluorescent dye is 〇. 2 mm to 5 mm, preferably 0.3 mm to 3 mm, more preferably 4 _ to 1 mm. When the color converter is composed of a single layer or has a layer structure, in a preferred embodiment the individual layers are Continuous and without any holes or breaking so that the light emitted by the LED must in each case pass through a matrix comprising at least one organic fluorescent colorant. The concentration of the organic fluorescent colorant in the matrix depends on the polymer layer. thickness Depending on the factors, if a thin polymer layer is used, the concentration of the organic fluorescent colorant is higher than in the case of using a thick polymer layer. The concentration of the organic fluorescent dye is in each case the amount of the matrix material. It is usually from 1% by weight to 0.5% by weight, preferably from 0.002% by weight, preferably from 5% by weight to 0.05% by weight, based on the amount of the matrix material. It is usually used in a concentration of from 0.001% by weight to 0.5% by weight, preferably from 0.005% by weight to 2% by weight, more preferably from 1:1% by weight to 0.1% by weight. In a preferred embodiment, organic is included. At least one of the layers or matrices of the fluorescent dye comprises a light dispersion. 162631.doc -16 - 201239065 In another preferred embodiment of the multilayer structure, there are several layers comprising a fluorescent dye and one or more A layer comprising a dispersion without a fluorescent dye. Suitable dispersions are inorganic white pigments, such as titanium dioxide, sulfuric acid locks, zinc white, zinc oxide, zinc sulfide, cesium carbonate, which have a din 13320 of from 0.01 μm to 10 μηι, preferably from 0 1 μηι to 1 μηι, more preferably 〇. The average particle size of 1 5 μηι to 0.4 μηι. The dispersion is in each case usually from 0.01% by weight to 2.0% by weight based on the polymer comprising the layer of the dispersion. Preferably, 〇 重量 5% by weight to 0.5% by weight, more preferably 1 1% by weight to 0.4% by weight, is included. The color converter of the present invention may optionally include other components, such as a carrier layer. The carrier layer is used to impart mechanical stability to the color converter. The type of material of the carrier layer is not critical as long as it is transparent and has the required mechanical strength. Suitable materials for the carrier layer are, for example, glass or transparent rigid organic polymers such as polycarbonate, polystyrene or polymethacrylate or polymethyl methacrylate. The carrier layer is supported by a thickness of from 0.1 mni to 10 mm, preferably from 0.3 mm to 5 mm, more preferably from 0.5 mm to 2 mm. The color converter of the present invention is suitable for converting light generated by an LED. The color converter of the present invention can be used in combination with LEDs in almost any geometric form and independently of the structure of the illumination device. The color converter of the present invention is preferably used in a remote phosphor structure. The color converter here is spatially separated from the LED. Typically, the distance between the LED and the color converter is from 11 cm to 50 cm, preferably from cm2 cm to 10 cm and optimally from 5 cm to 2 cm. For example, air, inert gas, nitrogen or its 162631.doc 201239065 may exist between a different medium of color converter and led gas or a mixture thereof. The color converters can, for example, be arranged concentrically around the LED arrangement or sheet. Flat panel or thin color converters and illumination devices of the present invention are known to the prior art: have a longer life and higher neutron yield when irradiated with LED lamps and have a comfortable launch The light of good color reproduction. The lighting device of the present invention is suitable for indoor lighting, and illumination of flashlights and game console numbers. , Outdoor Lighting, Office & Car, Street Light, Illuminated Road Sign Letter The present invention further provides a method of making a color converter comprising at least one organic colorant. In one embodiment of the invention, a method of making a color converter comprising an organic fluorescent dye comprises preparing a polymeric film, organic light in a crucible, a matrix material, and optionally scattering particles, to dissolve or disperse in the organic A polymer film in a solvent that is cured by the removal of the solvent into a dye-frozen distribution. Other embodiments of the invention include extrusion and/or injection of polystyrene or polycarbonate with an organic fluorescent colorant. Forming. EXAMPLES Materials used Polymer 1: Transparent homopolymer of methyl propyl carbamide, having 96 according to DIN EN ISO 306. Vic之vicat softening temperature, (from Ev〇灿之

Plexiglas® 6Ν) 162631.doc •18· 201239065 Polymer 2: Clear polycarbonate based on a polycondensate of A and phosgene (Makrolon® 3119 from Bayer) Polymer 3: Based on styrene homopolymer Transparent polystyrene with a density of 1048 kg/m3 and a Vicat softening temperature of 98t according to DIN EN ISO 306 (PS 168 N from BASF SE) Dye 1: from 3,9-dicyanoguanidine·4, ι A yellow/green fluorescent luminescent dye consisting of a mixture of bismuth (second butyl phthalate) and 3,1 〇 dicyanindole-4,9-bis (second butyl formate). Dye 2: a yellow/green fluorescent fluorescent dye called Ν_(2,6_: (isopropyl)phenyl)indole-3,4-didecanoic acid monodecimide. Dioxin: from sulfuric acid Salt process Ti〇2 rutile pigment with an average scattering capacity of 94.0 to 100 according to DIN 53165 (Kronos® 2056 from Kr〇n〇s Titan) Preparation of color converter: approx. 2.5 g polymer with 0 〇 3 weight % or 5% by weight of the dye (by mass of the polymer) is dissolved in about 5 ml of dichloromethane, and 3% by weight or 0.5% by weight of Ti 2 is dispersed therein. The resulting solution/dispersion was applied to the surface of the glass using a box-type coating bar (wet film thickness was (4). After the solvent was dried, the film was peeled from the glass and dried in a vacuum oven at 50 ° C overnight. This film is intended to be dispensed into a circular diaphragm with a diameter of 15 and subsequently tested. Prepare and analyze the following samples: 162631.doc 201239065 No. Polymer dye Dye content * Ti02 content * Film thickness 1 1 1 0.05% by weight 〇 ·1 weight ° / 〇 57 μιη 2 2 1 0.03 Weight 〇 / 0 0.5 weight ° / 〇 68 μηι 3 3 1 0·03 wt% 0.1 weight ° / 〇 73 μιη 4 1 2 0.05 wt% 0.1 wt% 43 μιη 5 2 2 '0.03 tf% 0.5% by weight 69 μιη 6 3 2 〇·〇3 wt% 0.1 wt°/〇73 μιη: Exposure of the sample with an exposure device based on the amount of the polymer used. The exposure device is exposed by the city Sale Luxe〇n V-

The Star series consists of GaN-LED (from Lumileds Lighting), LXHL_ LR5C Royal Blue model, and is built on the cooling unit with the reflector optics. The LED operates from approximately 550 mA to 700 mA and all exposure stations are set to the same intensity. Radiation is achieved at a wavelength of 455 nm. The brightness is about 0.09 W/cm2 〇 Measuring the life of the sample For analysis, the sample was removed from the exposure station and analyzed in a C9920-02 quantum yield measurement system (from Hamamatsu). This involves irradiating each sample with light from 450 nm to 455 nm in a ten-ball (Ulbricht sphere). By comparison with a reference measurement in a Ubrecht-free sample, the portion of the excitation light that is not absorbed and the fluorescence emitted by the sample are determined by a CCD spectrometer. The absorbance or fluorescence intensity or fluorescence quantum yield of each sample is obtained by integrating the intensity of the unexcited excitation light or the emitted fluorescence. Each sample was continuously exposed for 20 days and removed from the exposure device to measure the absorbance, fluorescence intensity, and fluorescence quantum yield of the color converter. 162631.doc -20- 201239065 The abscissas in Figures 1 and 3 show the exposure time in days, and the ordinate shows the percentage of absorbed incident light (45〇 11111 to 455 nm). The number next to the three curves corresponds to the sample number. In all cases, it was found that the absorption of light by the sample decreased with exposure time, but in the color converter (samples 2, 3, 5 and 6) composed of polystyrene or polycarbonate of the present invention, this reduction; This is much slower than in the case of the color converters (samples 4 and 4) of the present invention. The abscissas in Figures 2 and 4 show the exposure time in days and the ordinate shows the relative fluorescence intensity. The number next to the three curves corresponds to the sample number. The fluorescence intensity of the sample was found to decrease with time in all cases, but in the color converter of the present invention composed of polystyrene or polycarbonate (samples 2, 3, 5 and 6), this reduction ratio The case of the color converters (samples i and 4) not according to the invention is much slower. [Simple diagram of the diagram] The abscissa in Figure 1 shows the exposure time in days, and the ordinate shows the percentage of incident light (450 nm to 455 nm) absorbed in samples 1 to 3. 0 The abscissa in Figure 2 shows The exposure time in days, and the ordinate shows the relative fluorescence intensity of samples 1 to 3. In Fig. 3, the abscissa shows the exposure time in days, and the ordinate shows the sample °. The percentage of incident light (450 nm to 455 nm) that has been absorbed in 4 to 6. The abscissa in Fig. 4 shows the exposure time in days, and the ordinate shows the relative fluorescence intensity of samples 4 to 6. 162631.doc -21 -

Claims (1)

201239065 VII. Patent application scope: 1. A lighting device comprising at least one LED and at least one color converter. The color converter comprises at least one organic firefly in a matrix consisting essentially of polystyrene or polycarbonate. A light colorant in which the led and color converters are present in a remote phosphor arrangement. 2. For example, “•························································ 3. For example, the monthly illuminating device, the at least one organic glory coloring agent is an organic fluorescent dye that emits green or reddish color or the color of the color camp. 4·如#求项1或The illuminating device of claim 2, wherein the at least one organic glory coloring agent is a naphthalene or anthracene derivative. 5. The lighting device of claim 1 or 2, wherein the at least one organic camping colorant is selected from the group consisting of ]6263 l.doc 201239065 Wherein R 1 is straight or branched (^-(: 18 alkyl, C4-C8 cycloalkyl which may be mono- or polysubstituted by halogen or linear or branched bond 141818, or phenyl or naphthyl) Wherein phenyl and naphthyl may be mono- or polysubstituted by halogen or a linear or branched q-Cu alkyl group; x represents an ortho and/or para-substituent and is straight or branched (^ to < The illuminating device of claim 5, wherein the at least one organic fluorescent colorant is selected from the group consisting of N, N, and - bis (2,6-diisopropyl). Phenyl)-1,7-di(2,6-diisopropyl 162631.doc 201239065 phenoxy) flower-3,4:9,l-tetramethyleneimine, N,N•- Bis(2,6-diisopropylphenylbis(2,6-diisopropylphenyloxy) flower·3,4:9,1〇tetramethylenediamine, 3,9-dicyano茈-M0-bis (second butyl phthalate), 3,10-dicyanoindole-4,9-bis (second butyl phthalate), 3,9-dicyanoguanidine _4,1〇 _ double '(isobutyl phthalate), 3,l 〇-dicyanoindole _4,9 bis (isobutyl formate), N_, (2'6-mono(isopropyl)phenyl) fluorene- 3,4-dicarboxylic acid monoterpene imine and mixtures thereof. The illuminating device of claim 6, wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N,-bis(2,6-diisopropylphenyl)-i, 7-di (2,6-di) Isopropylphenoxy)indole-3,4:9,10-tetramethyldiimide, team; ^,-bis(2,6-diisopropylphenyl)-1,6-di(2 , 6-diisopropylphenoxy)indole-3,4:9,10-tetradecylimine and mixtures thereof 8. A color converter comprising at least one of substantially polystyrene Or an organic fluorescent dye in a matrix composed of polycarbonate, wherein the at least one organic fluorescent dye is selected from R1- * CN I6263l.doc 201239065 ο ^ Wherein R 1 is a linear or branched Ci-Cis alkyl group which may be halogen or linear or branched (^-(: CU-C: 8 cycloalkyl group which is mono- or polysubstituted with an alkyl group, or a phenyl group) Or a naphthyl group, wherein the phenyl or naphthyl group may be mono- or polysubstituted by halogen or a linear or branched CrC18 alkyl group; X represents an ortho and/or para-substituent and is a straight or a bond (:, The color converter of claim 8, wherein the at least one organic fluorescent dye is selected from the group consisting of N, N, -bis (2,6-diisopropyl). Phenyl diisopropyl 162631.doc 201239065 phenoxy) guanidine-3,4:9,10-tetradecylimine, n,N'-bis(2,6-diisopropylphenyl) -1,6-bis(2,6-diisopropylphenoxy)indole_34:9,10-tetradecylimine, 3,9-dicyanoindole-4,10-bis(曱Acidic butyl ester), 3,10-dicyanoindole-4,9-bis (second butyl formate), 3,9-dicyanoindole-4,10-bis. (isobutyl citrate) , 3,10-dicyanoindole-4,9-bis(isobutyl phthalate), N-. (2'6-di(isopropyl)phenyl)indole-3,4-dicarboxylic acid醯imine and mixtures thereof 10. Color conversion as in claim 9 Wherein the at least one organic fluorescent dye is selected from the group consisting of N,N'.bis(2,6-diisopropylphenylbis(2,6-diisopropylbasinoxy)indole-3, 4:9 , 10-tetramethyldiamine, ν, Ν1-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy) 茈·3 4 The color converter of any one of claims 8 to 10, wherein the at least one organic fluorescent colorant is dissolved in the matrix. The color converter of any one of claims 8 to 1 wherein the converter further comprises at least one inorganic white pigment as a scatterer. The color converter of any one of claims 8 to 1 wherein The color converter is a film, a sheet or a sheet. The method of producing a polymer film according to any one of claims 8 to 13 which comprises preparing a polymer film, wherein the organic fluorescent colorant is The matrix material and optionally the scattering particles are dissolved together in an organic solvent' and processed into a film by removing the solvent. 15' Manufactured according to any one of claims 8 to 13 And a method of extruding and/or injection molding the matrix material having the at least one organic fluorescent 162631.doc 3 201239065 colorant. 16. A color converter according to any one of claims 8 to 13 Use for converting a light produced by an LED. 17. Use of a color converter according to any one of claims 8 to 13 in combination with at least one LED in a remote phosphor structure. 162631.doc